How much would No. 11 Downing Street be worth as a private residence?

Grade II listed townhouse on the best side of Chester Square acquired at £1,406 per square foot just before the General Election, the lowest price paid on the square in years

The owner of three Knightsbridge apartments has come up with an inventive sweetener for his ambitious amalgamation plans - offering to divvy up a house in Holland Park to balance out the resulting loss…